Docs
How pptx.gallery works
pptx.gallery is the free reference catalog for OPF design choices. Every named design choice an OPF document can reference lives here, with a page, a preview, and metadata that both humans and AI agents can use.
Two audiences, one catalog
The gallery serves two co-equal audiences. Every page is designed for both.
Humans
Browse real presentation designs visually. Use named design choices as a shared vocabulary when describing what you want, to a colleague or to an AI agent.
AI agents
Query the catalog during presentation generation. Every design choice has a stable OPF name, structured data, and a JSON endpoint you can consume programmatically.
The OPF contract
OPF (Open Presentation Format) is the open presentation format specified at openpresentation.org. An OPF document describes a presentation as a collection of named choices — “use the modern-minimal color scheme, the aptos font scheme, the problem-solution narrative” — instead of a pile of raw pixels.
Those names need a canonical home. Somewhere an agent or a human can look them up and see what they mean. That’s the gallery.
Every gallery item’s slug is a stable OPF identifier. Changing a slug is a breaking change across the entire ecosystem, so they don’t change without a very good reason.
Gallery dimensions
Each dimension catalogs a category of OPF-named design choice. Fourteen dimensions, all sourced from the OPF schema.
| Dimension | Status | Notes |
|---|---|---|
| Layouts | Live | 459 items with category and content-type filtering |
| Color Schemes | Live | 14 schemes with mood and industry metadata |
| Font Schemes | Live | 89 upstream schemes plus legacy curated slugs |
| Backgrounds | Live | 6 styles with best-practice guidance |
| Narratives | Live | 48 frameworks with beat-by-beat guidance, duration, and audience fit |
| Charts | Live | 26 Aspose.Slides-supported chart types with OPF coverage notes |
| Themes | Live | 4 composed references from the OPF core catalog |
| Audiences | Live | 16 profiles with OPF generation hints, recommended tones, density, narrative, color, and layout guidance |
| Tones | Live | 7 OPF voice profiles with generation cues, anti-patterns, sample phrases, and narrative fit |
| Purposes | Live | 9 OPF purpose records with outcomes, success criteria, and narrative and tone fit |
| Languages | Live | 93 OPF language records with BCP-47 tags and default font-scheme hints |
| Socials | Live | 10 OPF social platform records with brand colors, handle prefixes, and URL patterns |
| Headers & Footers | Live | 10 patterns for slide numbers, dates, logos, legal lines, and classification |
| Content Blocks | Live | 32 pre-composed sections with copyable OPF snippets |
| Image Treatments | Live | 15 treatments for placement, crop, overlay, mask, caption, and filters |
For AI agents
The gallery is built to be consumed programmatically. Today you can rely on:
- Stable URL structure:
/{dimension}for index,/{dimension}/{slug}for detail. - Per-item metadata on every page: JSON-LD structured data, Open Graph tags, and canonical URLs.
sitemap.xmlenumerating every catalog page and how-to article.llms.txtdiscovery atpptx.gallery/llms.txt.- JSON API routes per live dimension (e.g.
/api/layouts.json,/api/charts.json) with structured catalog data.
Full endpoint and registry-format documentation lives in the API & registry reference.
Catalog and local editing
- Catalog references. Gallery items describe named design choices. Open an item in the editor to use it in a deck.
- Local slide editing. The visual OPF editor supports OPF import, content and property edits, live preview, undo/redo, and editable PowerPoint export in your browser. Save OPF to keep your changes; review exported slides in PowerPoint with the chosen fonts installed.
- Free access. No ads, no accounts, no paywalls.
Ecosystem
pptx.gallery sits alongside a small family of tools that all speak OPF:
openpresentation.org
The open format: specification, JSON Schemas, core catalogs, CLI and agent skills, all MIT licensed. The catalog ids on this site are defined there.
pptx.dev
Hosted API, AI and file services built on OPF. It sponsors this gallery.
DeckChat
Chat-driven presentation authoring. Uses gallery names as a shared vocabulary with its users.